Got a vacuum gauge on both my rides and I check it more than rpm or speed.
It is a very revealing tool indeed.
BTW, I have original 3 speeds and 3.55 gears and my cams give highest torque around 2500-3000 rpm, going between 60-70 mph all day on the freeways with 18-20 mpg.
My 261 climbs mountains like a train and I only notice it cos the cars get smaller in my mirrors much quicker than with my old 235 that keeps up with traffic on our mountain freeways just fine.
PS: We got a lot of them birdies around here. They sure can fly across the ground without wings.
My dogs can never catch them.
